87533240 has 16 divisors (see below), whose sum is σ = 196949880. Its totient is φ = 35013280.

The previous prime is 87533219. The next prime is 87533249. The reversal of 87533240 is 4233578.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 87533197 and 87533206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87533249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1094126 + ... + 1094205.

Almost surely, 2^87533240 is an apocalyptic number.

It is an amenable number.

87533240 is an abundant number, since it is smaller than the sum of its proper divisors (109416640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87533240 is a wasteful number, since it uses less digits than its factorization.

87533240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188342 (or 2188338 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 87533240 is about 9355.9200509624. The cubic root of 87533240 is about 444.0082107618.

The spelling of 87533240 in words is "eighty-seven million, five hundred thirty-three thousand, two hundred forty".